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wlantest: Add support for reading pcap files with prism header

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This commit is contained in:
Jouni Malinen 2010-12-02 12:56:37 -08:00 committed by Jouni Malinen
parent 482856c8ba
commit 350132bec5
3 changed files with 56 additions and 1 deletions
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38
wlantest/process.c
View file

@ -224,3 +224,41 @@ void wlantest_process(struct wlantest *wt, const u8 *data, size_t len)
else
tx_status(wt, frame, frame_len, !failed);
}
void wlantest_process_prism(struct wlantest *wt, const u8 *data, size_t len)
{
int fcs = 0;
const u8 *frame, *fcspos;
size_t frame_len;
u32 hdrlen;
wpa_hexdump(MSG_EXCESSIVE, "Process data", data, len);
if (len < 8)
return;
hdrlen = WPA_GET_LE32(data + 4);
if (len < hdrlen) {
wpa_printf(MSG_INFO, "Too short frame to include prism "
"header");
return;
}
frame = data + hdrlen;
frame_len = len - hdrlen;
fcs = 1;
if (fcs && frame_len >= 4) {
frame_len -= 4;
fcspos = frame + frame_len;
if (check_fcs(frame, frame_len, fcspos) < 0) {
wpa_printf(MSG_EXCESSIVE, "Drop RX frame with invalid "
"FCS");
wt->fcs_error++;
return;
}
}
rx_frame(wt, frame, frame_len);
}

18
wlantest/readpcap.c
View file

@ -27,6 +27,7 @@ int read_cap_file(struct wlantest *wt, const char *fname)
struct pcap_pkthdr *hdr;
const u_char *data;
int res;
int dlt;
pcap = pcap_open_offline(fname, errbuf);
if (pcap == NULL) {
@ -34,6 +35,14 @@ int read_cap_file(struct wlantest *wt, const char *fname)
fname, errbuf);
return -1;
}
dlt = pcap_datalink(pcap);
if (dlt != DLT_IEEE802_11_RADIO && dlt != DLT_PRISM_HEADER) {
wpa_printf(MSG_ERROR, "Unsupported pcap datalink type: %d",
dlt);
pcap_close(pcap);
return -1;
}
wpa_printf(MSG_DEBUG, "pcap datalink type: %d", dlt);
for (;;) {
res = pcap_next_ex(pcap, &hdr, &data);
@ -66,7 +75,14 @@ int read_cap_file(struct wlantest *wt, const char *fname)
continue;
}
count++;
wlantest_process(wt, data, hdr->caplen);
switch (dlt) {
case DLT_IEEE802_11_RADIO:
wlantest_process(wt, data, hdr->caplen);
break;
case DLT_PRISM_HEADER:
wlantest_process_prism(wt, data, hdr->caplen);
break;
}
}
pcap_close(pcap);

1
wlantest/wlantest.h
View file

@ -154,6 +154,7 @@ void write_pcap_captured(struct wlantest *wt, const u8 *buf, size_t len);
void write_pcap_decrypted(struct wlantest *wt, const u8 *buf1, size_t len1,
const u8 *buf2, size_t len2);
void wlantest_process(struct wlantest *wt, const u8 *data, size_t len);
void wlantest_process_prism(struct wlantest *wt, const u8 *data, size_t len);
void wlantest_process_wired(struct wlantest *wt, const u8 *data, size_t len);
u32 crc32(const u8 *frame, size_t frame_len);
int monitor_init(struct wlantest *wt, const char *ifname);